Re: cash is king
The arc of history bends not only towards justice but towards convenience. On Monday, I didn't even slow down at a toll plaza (EZPass can now read at 55 MPH). I no longer need to research new artists; Amazon tells me what I want. Heck, I can deposit a check by taking a photo of it with my phone. Cash is convenient for very small purchases like those Chris describes, but overall, people prefer to use plastic, if only to rack up whatever rewards they get. That 2% back adds up over time.
While I agree chip and pin will help, unless CC providers figure out how to meld convenience and security, the field is open for a disruptive new tech. Just wish I knew what it was ..